1908] 



GOW—EMBRYOGENY OF ARISAEMA 



39 



iron-alum-hematoxylin, or safranin and gentian-violet. In the 

 latter case a saturated solution of each stain in anilin water was used, 

 and very excellent results were obtained. 



MEGASPORAXGIUM 



arv of Arisaema contains one to sk erect, orthotropou 



o^njles (fig. 7). 



ovule 



hundred ovaries were 



B 



number was found to be four (fig 



They 



stigma; J, conducting cells; c, inner integument; 



-Fig- 2. Trans- 



X36. 



cells 



O5 outer integument; e, embr 

 verse section of ovary. X 36. 



not drawn, X38S. — Fig, 4. jr- o 



archesporium. X 400.— Fig. 5. Cross-section of nucellus showing four sporogenous. 



cells, X400.— Fig. 6. Dhision of sporogenous cell X400. 



iporogenou 



appear 



be 



occurrence of four ovules grouped equilaterally about 



protuberance in the middle of the base of the ovary 



would indicate* the latter as the suppressed apex 



This 



mm 



one somewhat of the 



Dieffenbachia/ except that in 



more complete. 



Arisaema 



the ax?s- 



of the axis m 



much 



Cascpbeix, D, H., Studies on the Araceae. 



Annals of Botaiqr 



QOC3. 



